INHIBITION OF CLASS-II MAJOR HISTOCOMPATIBILITY COMPLEX ANTIGEN-PROCESSING BY ESCHERICHIA-COLI HEAT-LABILE ENTEROTOXIN REQUIRES AN ENZYMATICALLY ACTIVE A SUBUNIT
Mp. Matousek et al., INHIBITION OF CLASS-II MAJOR HISTOCOMPATIBILITY COMPLEX ANTIGEN-PROCESSING BY ESCHERICHIA-COLI HEAT-LABILE ENTEROTOXIN REQUIRES AN ENZYMATICALLY ACTIVE A SUBUNIT, Infection and immunity, 66(7), 1998, pp. 3480-3484
Escherichia coil heat-labile enterotoxin (LT) and cholera toxin (CT) w
ere found to inhibit intracellular antigen processing. Processing was
not inhibited by mutant LT with attenuated ADP-ribosyltransferase acti
vity, CT B or LT B subunit, which enhanced presentation of preexisting
cell surface peptide-class II major histocompatibility complex comple
xes. Inhibition of antigen processing correlated with A subunit ADP-ri
bosyltransferase activity.